<template>
  <div>
    <div class="card" style="margin-bottom: 5px">
      <!--      加上clearable这个属性可以快速清除也就是那个叉叉顺便刷新一下 v-model="data.name" 将输入的文字显示到输入框内-->
      <el-input clearable @clear="load" style="width: 240px;margin-right: 5px;" v-model="data.name" placeholder="请输入标题查询" :prefix-icon="Search"></el-input>

      <el-button type="primary" @click="load">查 询</el-button>
      <el-button @click="reset">重 置</el-button>
    </div>


    <div class="card" style="margin-bottom: 5px" v-if="data.user.role === 'ADMIN'">
      <el-button type="primary" @click="handleAdd">新 增</el-button>
    </div>


    <div class="card" style="margin-bottom: 5px">
      <el-table :data="data.tableData" style="width: 100%" :header-cell-style="{fontWeight: 'bold',color: '#333',backgroundColor: '#c902f6'}">

        <el-table-column prop="img" label="图书封面">
          <template #default="scope">
            <el-image v-if="scope.row.img" :preview-src-list="[scope.row.img]"
                      :src="scope.row.img" :preview-teleported="true"
                      style="width: 40px; height: 40px;border-radius: 5px;display: block;" />
          </template>
        </el-table-column>
        <el-table-column prop="name" label="图书名字"/>
        <el-table-column prop="price" label="图书价格" />
        <el-table-column prop="author" label="作者" />
        <el-table-column prop="num" label="剩余数量" />
        <el-table-column label="操作" width="100">
          <template #default="scope" v-if="data.user.role==='ADMIN'">
            <el-button type="primary" icon="Edit" circle @click="handleEdit(scope.row)"></el-button>
            <el-button type="danger" icon="Delete" circle @click="del(scope.row.id)"></el-button>
          </template>

          <template #default="scope" v-else>
            <el-button type="primary"  @click="borrow(scope.row)">借阅</el-button>
          </template>
        </el-table-column>
      </el-table>
    </div>

    <div class="card">
      <el-pagination
          v-model:current-page="data.pageNum"
          v-model:page-size="data.pageSize"
          :page-size="data.pageSize"
          layout="total,sizes, prev, pager, next,jumper"
          :page-sizes="[5,10,20]"
          :total="data.total"
          @current-change="load"
          @size-change="load"

      />
    </div>


    <el-dialog v-model="data.formVisible" title="图书信息" width="30%" destroy-on-close>
      <el-form ref="formRef" :model="data.form" :rules="data.rules" label-width="80px" style="padding: 20px 30px 10px 0">

        <el-form-item prop="img" label="图书封面" >
          <el-upload
              action="http://localhost:9999/files/upload"
              :headers="{ token: data.user.token }"
              :on-success="handleFileSuccess"
              list-type="picture"
          >
            <el-button type="primary">上传封面</el-button>
          </el-upload>
        </el-form-item>


        <el-form-item prop="name" label="图书名字">
          <el-input v-model="data.form.name" autocomplete="off" placeholder="请输入图书名字"/>
        </el-form-item>

        <el-form-item prop="price" label="图书价格">
          <el-input  v-model="data.form.price" autocomplete="off" placeholder="请输入图书价格"/>
        </el-form-item>

        <el-form-item prop="author" label="图书作者">
          <el-input  v-model="data.form.author" autocomplete="off" placeholder="请输入图书作者"/>
        </el-form-item>

        <el-form-item prop="num" label="图书剩余数量">
          <el-input  v-model="data.form.num" autocomplete="off" placeholder="请输入图书剩余数量"/>
        </el-form-item>



      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button @click="data.formVisible = false">Cancel</el-button>
          <el-button type="primary" @click="save()">
            Confirm
          </el-button>
        </div>
      </template>
    </el-dialog>

  </div>
</template>
<script setup>

import {Search} from "@element-plus/icons-vue";
import {reactive,ref} from "vue";
import request from "@/utils/request.js";
import {ElMessage, ElMessageBox} from "element-plus";


const formRef = ref()
const data = reactive({
  user: JSON.parse(localStorage.getItem('code2025_user') || "{}"),
  name: null,
  pageNum: 1,
  pageSize: 5,
  total: 0,
  tableData: [],
  form: {},
  formVisible: false,
  rules: {
    img: [
      {required: true,message: '请上传图书封面',trigger: 'blur'}
    ],
    name: [
      {required: true,message: '请填写图书名字',trigger: 'blur'}
    ],
    price: [
      {required: true,message: '请填写图书价格',trigger: 'blur'}
    ],
    author: [
      {required: true,message: '请填写图书作者',trigger: 'blur'}
    ],
    num: [
      {required: true,message: '请填写图书剩余数量',trigger: 'blur'}
    ],

  }
})

const load = () => {
  request.get('/book/selectPage',{
    params: {
      pageNum: data.pageNum,
      pageSize: data.pageSize,
      name: data.name
    }
  }).then(res=>{
    if(res.code === '200'){
      data.tableData = res.data?.list
      data.total = res.data?.total
    }else{
      ElMessage.error(res.msg)
    }
  })
}
load()

const handleEdit = (row) => {
  data.form = JSON.parse(JSON.stringify(row))
  data.formVisible = true
}

const handleAdd = () => {
  data.form = {}
  data.formVisible = true
}

const add = () => {
  request.post('/book/add',data.form).then(res => {
    if(res.code==='200'){
      ElMessage.success("新增成功")
      data.formVisible = false
      load()
    }else{
      ElMessage.error(res.msg)
    }
  })
}

const save = () => {
  formRef.value.validate(valid => {
    if(valid) {
      data.form.id?update():add()
    }else{
      ElMessage.error(res.msg)
    }
  })
}

const update = () => {
  request.put('/book/update',data.form).then(res => {
    if(res.code === '200'){
      ElMessage.success('更新成功')
      data.formVisible = false
      load()
    }else{
      ElMessage.error(res.msg)
    }
  })
}


const del = (id)=>{
  ElMessageBox.confirm('删除后无法恢复,您确认删除吗?','删除确认',{ type:"warning" }).then(res => {
    request.delete('/book/delete/'+id).then(res=>{
      if(res.code === '200'){
        ElMessage.success('删除成功')
        load()
      }else{
        ElMessage.error(res.msg);
      }
    })
  }).catch(err=>{

  })
}

const reset = () =>{
  data.name = null;
  load()
}
const borrow = (row) => {

  request.post('/record/add',{
    userId: data.user.id,
    bookId: row.id
  }).then(res=>{
    if(res.code === '200') {
      ElMessage.success('操作成功,等待管理员审核!')
      load()
    }else{
      ElMessage.error(res.msg)
    }
  })
}

const handleFileSuccess = (res) => {
  data.form.img = res.data
}
</script>